40251530 has 32 divisors (see below), whose sum is σ = 79843968. Its totient is φ = 14488000.

The previous prime is 40251517. The next prime is 40251553. The reversal of 40251530 is 3515204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9299 + ... + 12921.

It is an arithmetic number, because the mean of its divisors is an integer number (2495124).

Almost surely, 2^40251530 is an apocalyptic number.

40251530 is a deficient number, since it is larger than the sum of its proper divisors (39592438).

40251530 is a wasteful number, since it uses less digits than its factorization.

40251530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40251530 is about 6344.4093499710. The cubic root of 40251530 is about 342.7105424009.

Adding to 40251530 its reverse (3515204), we get a palindrome (43766734).

It can be divided in two parts, 4025 and 1530, that added together give a palindrome (5555).

The spelling of 40251530 in words is "forty million, two hundred fifty-one thousand, five hundred thirty".